fix: Add HTTP status checks before JSON parsing in tests

Author: darshild1024-cpu

test.html

@@ -164,6 +164,13 @@ <h2>📊 Overall Status</h2>
 
             try {
                 const response = await fetch(`${API_URL}/FRED-GDP?mode=latest`);
+                if (!response.ok) {
+                    resultDiv.className = 'result error';
+                    resultDiv.textContent = `❌ HTTP ${response.status}: ${response.statusText}\nURL: ${response.url}`;
+                    testResults['api'] = false;
+                    updateOverallStatus();
+                    return;
+                }
                 const data = await response.json();
 
                 testResults['api'] = response.status === 200 || response.status === 401;
@@ -195,6 +202,11 @@ <h2>📊 Overall Status</h2>
                 const response = await fetch(`${API_URL}/FRED-GDP?mode=latest`, {
                     headers: { 'Authorization': `Bearer ${key}` }
                 });
+                if (!response.ok) {
+                    resultDiv.className = 'result error';
+                    resultDiv.textContent = `❌ HTTP ${response.status}: ${response.statusText}`;
+                    return;
+                }
                 const data = await response.json();
 
                 if (data.error) {
@@ -263,6 +275,13 @@ <h3>Tests Passed: ${passed}/${total} (${percentage}%)</h3>
 
             try {
                 const response = await fetch('https://www.datasetiq.com/api/public/search?q=GDP');
+                if (!response.ok) {
+                    resultDiv.className = 'result error';
+                    resultDiv.textContent = `❌ HTTP ${response.status}: ${response.statusText}\nURL: ${response.url}`;
+                    testResults['search'] = false;
+                    updateOverallStatus();
+                    return;
+                }
                 const data = await response.json();
 
                 testResults['search'] = response.status === 200 && Array.isArray(data);
@@ -289,6 +308,13 @@ <h3>Tests Passed: ${passed}/${total} (${percentage}%)</h3>
 
             try {
                 const response = await fetch('https://www.datasetiq.com/api/public/search?q=GDP&source=FRED');
+                if (!response.ok) {
+                    resultDiv.className = 'result error';
+                    resultDiv.textContent = `❌ HTTP ${response.status}: ${response.statusText}`;
+                    testResults['search-source'] = false;
+                    updateOverallStatus();
+                    return;
+                }
                 const data = await response.json();
 
                 testResults['search-source'] = response.status === 200 && Array.isArray(data);
@@ -315,6 +341,13 @@ <h3>Tests Passed: ${passed}/${total} (${percentage}%)</h3>
 
             try {
                 const response = await fetch(`https://www.datasetiq.com/api/public/search?source=${source}&limit=50`);
+                if (!response.ok) {
+                    resultDiv.className = 'result error';
+                    resultDiv.textContent = `❌ HTTP ${response.status}: ${response.statusText}\nURL: ${response.url}`;
+                    testResults[`browse-${source}`] = false;
+                    updateOverallStatus();
+                    return;
+                }
                 const data = await response.json();
 
                 testResults[`browse-${source}`] = response.status === 200 && Array.isArray(data);